Natural depolymerization of waste poly(ethylene terephthalate) by neutral hydrolysis in marine water.

Natural depolymerization of waste poly(ethylene terephthalate) by neutral hydrolysis in marine water.
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DOI:
10.1038/s41598-021-83659-2
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发表时间:
2021-02-24
期刊:
影响因子:
4.6
通讯作者:
Matei D
Matei D
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Stanica-Ezeanu D;Matei D

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聚对苯二甲酸乙二醇酯(PET)是食品包装和渔网最广泛使用的材料之一。使用后,它成为废物,由于收集不善,大多数将被发现漂浮在海洋沃茨。本文介绍了PET水解解聚的研究结果。我们观察到海水是一个完美的反应物,因为它含有大量的金属离子,作为催化剂。建立了一级反应动力学模型,并对实验数据进行了拟合,得到反应活化能为73.5kJ/mole,指前因子为5.33 × 107 h ~(-1)。考虑到全球海洋是一个在等温条件下操作的巨大间歇反应器,数学模型的解表明,在热带地区,PET转化总共仅需要72年,50%的PET转化仅需要4.5年。
Polyethylene terephthalate (PET) is one of the most widely used materials for food packaging and fishing nets. After use it become waste and, due to poor collection, most will be found floating in marine waters. This paper presents the results of a study of PET depolymerization by hydrolysis. We observed that marine water is a perfect reactant because it contains a multitude of metal ions that act as catalysts. A first-order kinetic model was developed and experimental data fitted to it. An activation energy of 73.5 kJ/mole and a pre-exponential factor of 5.33 × 107 h–1 were obtained. Considering that the global ocean is a huge batch reactor operating under isothermal conditions, the solution of the mathematical model shows that in tropical regions only 72 years is needed for total and only 4.5 years for 50% PET conversion.
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